138510007 has 2 divisors, whose sum is σ = 138510008. Its totient is φ = 138510006.

The previous prime is 138509957. The next prime is 138510017. The reversal of 138510007 is 700015831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138510007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138510017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69255003 + 69255004.

It is an arithmetic number, because the mean of its divisors is an integer number (69255004).

Almost surely, 2^138510007 is an apocalyptic number.

138510007 is a deficient number, since it is larger than the sum of its proper divisors (1).

138510007 is an equidigital number, since it uses as much as digits as its factorization.

138510007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 138510007 is about 11769.0274449506. The cubic root of 138510007 is about 517.4007458211.

Adding to 138510007 its reverse (700015831), we get a palindrome (838525838).

The spelling of 138510007 in words is "one hundred thirty-eight million, five hundred ten thousand, seven".